Manifold air intake



Oct. 23, 1934. 1 N, HULL 1,978,262

MANIFOLD AIR INTAKE Original Filed Dec. 16, 1951 kann. WV

we@ \L W isintroduced in such a manner as to increase the Patented Oct. 23, 1934 f UNITED. STATES PATENT OFFICE Application December 16g 1931, Serial No. 581,474 l Renewed March 9, 1934 s C1aims (011123-124) `This `invention relates to manifom air intakes for internal combustion engines.

An important objectl of the invention isto providenovel `means for supplying additional air to 5 a motor vehicle engine at a progressively increas- `ing rate in accordance w'th the opening' movep ment of the engine throttle.'

A further object is to. provide a device of the I"characterreferred to wherein the additional air `turbulence in the fuelmixture passing into the motor torincrease the explosive efficiency ofthe mixture. n

` A furtherobject is to provide a `novel device o @15. ofthe character referred to which is adapted to be readily and easily connected to the intake of thevehicleengine. L ,4 A further object is to provide means automatically operativefor preventing thesupply. of ad- 2 ditional airupon operation of the carbureter choke valve while the motor` is being started.

Other objects `and advantages ofthe invention will become apparent during the course off` the followingdescription. V :l p In the drawing I havejshown one .embodiment ofthe invention.` Inthis'showing, i

Figure 1is a side elevation of ma portion of l the vehicleengine showingthe inventionapplied, .`Figure,2`is an `enlarged 'fragmentary side ele- '530 vation of the device showing it in position on a portion of the intake manifold. f

`Figure is v `an enlarged. detail `section taken substantiallyon line 3 3 fof Figure 2,1 and 4 vFigure 4 is a transversesection online 4,-4 `of 35 Figure 2,.

Referring to Figure 1 the vnumeral 10 designates i amotor vehicle engine having,the, usual exhaust manifold lland intake, manifold 12the latter being provided with4 a vertical'portion 13 vconnected at its lower end toagcarbureterll. The carbureteris provided, with a throttle 15 con- `nected to arock shaft 16 operable by one end of `a bell cranklever `17. A throttle control rod 18 is connected to the bell crank lever 17. The carbureter is further provided withthe usual air intake 19 in whichjis` arranged a choke valve 20 operableby an arm 21. The elements described are conventional `in construction and form no part of the present invention.

` '50 The device rforming the subject matter of the present invention comprises a `cast cylindrical The body of the device is adapted to be arranged "55. 4around the vertical pipe' 13 and to be secured in position by suitable fastening elements such as oo screws 25. l

The body section 23 is axially enlarged as at 26, andV this enlarged portion carries oppositely extending preferably angularly arranged extensions 27 grooved as at 28 to form a guide of dovetail cross-sectional shape.

The guide 28 is provided throughout its length with a substantially flat preferably machined inner'face 29. The body section 23 is longitudinally slotted as at 30 to provide an air intake port which communicates with a preferably circular opening or port31 formed in the pipe 13. VWhile the portion of the port 30 extending through the face 29 of the guide is in the form of a longitudinal slot having parallel sides, the port 30 is altered in -shapevinwardly sothat its inner extremity coincides in shape and size to and registers With`the opening 31. l

A pair of slide valves 32 and 33 are operable in the guide 28. With the throttle in idling position, the adjacent edges of the valves 32 and 33 contact with each other substantially at the position indicated in Figure 3. The upper end of "a rod 34 is pivotally connected asy at 35 to the upper end of the valve 32; The lower end ofthe rod 34 is pivotally connected as at 36 to the other arm ofr the bell crank lever 17. A second operating rod 37 has its upper end pivotally connected as at 38 to the lower end of the valve 33, and the Vlower end of the rod 37 is pivotally connected as at 39 to the arm 21.

f The operation of the device is as follows:

The vertical pipe 13' is drilled radially to provide the opening 31 of the proper size whereupon the body sections 23 and 24 are clamped about the pipe 13 with the inner extremity of the port 30 registering with the port 31. The rods 34 and '37 are then connected respectively `to the bell crank lever 17 and arm 21; l

In operation, the choke valve is not normally operated, While the throttle 15 is almost constantly changing position,"as is well known. When a pull islexerted on the throttle rod 18, the bell crank lever 17 is swung in a counterclockwise direction to open the throttle, and the movement of the bell crank lever is transmitted through the rod 34 to the valve 32to progressively move the `latter upwardly in accordance with opening movement of the throttle. Since, under normalconditions, the valve 33 remains stationary, the upward movement of the valve 32 progressively uncovers the port to admit` air through the port 31 into the vertical pipe ,13. It will'be apparent that the outer extremity of the `starting the vehicle. yconditions serves the additional function of movport will be uncovered to a greater extent to increase the rate of flow of air into the manifold as the throttle is opened to increasing extents. However, regardless of the degree of opening of the port 3l, the additional air will always be supplied to the intake manifold at the same point through the same sized opening 31 with the air always moving in the same direction. It has been found that the introduction of the air through a circular relatively small opening creates a condition of great turbulence in the fuel which results in greatly increased mileage from the fuel without an attending loss of power.

When it is desired to start the vehicle vand to use the choke in accordancev with standard practice, the operator merely pulls out the choke button on the dash and operates ythe .starter in the usual way. The operation of the choke .causes the arm 21 to swing in a clockwise direction, `thus moving the arm 37 and valve 33 upwardly. The

Avalve 33 thus operates as a follower for the valve 32 to prevent the port 30 from being opened to the atmosphere, which would be undesirable when The valve 33 under such ing the valve 32 upwardly, 'and this movement is transmitted to the throttle through the rod 34 and the lever 17, and thus the throttle is automatically opened upon loperation of the choke valve as is desirable. The device accordingly facilitates the operation of starting the motor vehicle engine.

It will be vapparent that the device may be cheaply manufactured because of its simplicity in construction, and that it readily may be applied to the manifold. In practice it has been found that there is no noticeable loss in power in the use of the device, but `that great fuel economy is effected.

It is to be understood that the Aform of the invention herewith shown and described is to be taken as a preferred example of the same land that various changes in the shape, size and arrangement of parts may vbe ,resorted to without departing from the spirit of the `invention or the scope of the subjoined claims.

I claim:

1. An attachment for an intake manifold supply pipe having a radial opening therein, comprising a body adapted to be arranged against the manifold pipe and having a port correspondin shape and size to and adapted to register with said opening, said body having an outer face through which'said port extends, and a valve movable to progressively lopen vandfclose said port and slidable across the outer face of said body, the outer end of said port being elongated in the direction of movement of said valve. y

2. An lattachment for an lintake manifold supply pipe having a radial opening therein, comprising a body formed of complementary sections adapted to be arranged against the manifold pipe, one of said sections having a port the inner end of which corresponds in shape and size to and is adapted to register with said opening, said last named section having an elongated outer face through which the outer end of lsaid port eX- tends, said port -having its outer end formed relatively long and narrow and arranged `parallel to the direction of elongation of said outer face, and a slide valve movable against said face longitudinally with respect to the outer end of said port to progressively open and close the latter.

3. vAn attachment for an` intake manifold supply pipe having a. circular radial opening therein, comprising a body adapted to be arranged against the manifold pipe and having a port the inner end of which corresponds in shape and size to and is adapted to register with said opening, said body having an outer face through which said port extends, and a valve movable to progressively open and close said port and slidable across the outer face of said body, the outer end of said port being elongated in the direction of movement of said valve, and a follow up valve for said first named valve movable therewith to prevent the opening of said port when said first named valve is operated.

4. An attachment for an intake manifold supply pipe having a circular radial opening therein, comprising a vbody formed of complementary sections adapted to be arranged against the manifold pipe, one of said sections having a port the inner end of which corresponds in shape and size to and is adapted to register with said opening, said last named section having an elongated outer face through which the outer end of said port extends, said port having its outer end formed relatively long and narrow and arranged parallel to the direction of elongation of said outer facef;

a slide valve movable against said face longitudinally with 'respect to the outer end of said port to progressively open and close the latter, and a follow up valve movable with and against said first named valve to prevent the opening of the.;

outer end of said port upon movement of said first named valve.

5. An attachment for an intake manifold supply pipe having a circular radialv opening' therein, comprising a body adapted to be arranged against the :manifold pipe and having a port corresponding in shape and size at 'its inner end to said opening and adapted to register therewith, said body having an youter face through which said port extends, a valve progressively movable to open and close said port and slidable across the outer face vof said body, the Vouter end of said port being V.relativelynarrow and elongated in the direction of movement of said valve, means for connecting said valve to the throttle ,of the engine to be progressively opened therewith, and an auxiliary valve movable with said first named valve to prevent the opening of said port.

v'6. An attachment for an intake manifold supply pipe having a circular radial opening therein, comprising a body adapted to be arranged against the manifold pipe and having a port corresponding in lshape andsize Vat its inner end to said opening and adapted to register therewith, said body having an outer face through which said port extends, a valve progressively movable to `open and close said port and slidable across the .outer face of said body, the outer end of said port being relatively narrow and elongated in the direction of movement of said valve, means for connecting said valve to the throttle of the engine to be progressively opened therewith, an auxiliary valve arranged in end to end relation with said first named valve and movable therewith to prevent the opening of said port, and operating connections between said auxiliary valve and the choke valve of the carbureter connected to the manifold. 4

7. An attachment for an intake manifold supply pipe having a circular radial opening therein,

and a carburetor connected to the manifold, comprising a body adapted to be arranged against the manifoldv pipe, said body having a port the inner end of which corresponds in shape and size to and Ais adapted to register with said opening, said body having an elongated outer face through which the outer end of said port extends, said port having its outer end formed relatively long and narrow and arranged parallel to the -direction of elongation of said outer face, a valve mounted against said outer face for linear sliding movement longitudinally thereof to progressively open and close said port, operating connections between said valve and the throttle Valve of the carbureter for effecting simultaneous opening movement of said valves, an auxiliary valve arranged against said outer face in end to end relation with said rst named valve and slidable JOSEPH N. HULL. 

